<a4j:outputPanel
  xmlns:a4j="http://richfaces.org/a4j"
  xmlns:nxl="http://nuxeo.org/nxforms/layout"
  xmlns:c="http://java.sun.com/jstl/core"
  xmlns:f="http://java.sun.com/jsf/core"
  xmlns:h="http://java.sun.com/jsf/html"
  layout="block"
  id="#{nxu:test(empty widgetProperty_ajaxPanelId, widget.id, widgetProperty_ajaxPanelId)}">

  <a4j:outputPanel id="#{widget.id}_subPanel" layout="block"
    rendered="#{widgetProperty_rendered}">
    <a4j:region id="#{widget.id}_subRegion"
      rendered="#{widgetProperty_rendered}">

      <nxl:subWidget>
        <nxl:widget widget="#{widget}" value="#{value}" />
      </nxl:subWidget>

    </a4j:region>
  </a4j:outputPanel>

</a4j:outputPanel>
